Pivoted blade cultivator



Nov. 17, 1953 G. A. BURR PIVOTED BLADE CULTIVATOR 2 Sheets-Sheet 1 Filed Dec. 15 1950 ATTORNEYS Nov. 17, 1953 G. A. BURR 2,659,285 I PIVOTED BLADE CULTIVATOR Filed Dec. 15, 1950' 2 Sheets-Sheet 2 IAVIA'IIIIIIA'IIIIIJ k G fl Earn INVENTOR ATTORNEYS Patented Nov. 17, 1953 UNITED STATES PATENT FFECE 2,659,285 PIVOTED BLADE CULTIVATOR Gordon A. Burr, Pruitt, Ark. Application December 15, 1950, Serial N 0. 201,047 1 Claim. (01. 9736) This invention relates to cultivator construction of the type embodying a plurality of pivoted blades so constructed and operated that during the operation of the cultivator to condition the ground surface or soil for planting purposes, the blades will operate with a movement simulating the movements of a hoe in the hands of a person operating a hoe.

An important object of the invention is to provide a cultivator having mechanical means for operating the pivoted blades thereof, wherein the operating angles of the blades may be adjusted to meet various requirements of use.

Still another object of the invention is to pro vide a cultivator having means for spreading the soil, after the soil has been loosened or cultivated by the blades of the cultivator.

With the foregoin and other objects in view which will appear as the description proceeds, the invention consists of certain novel details of construction and combinations of parts hereinafter more fully described and pointed out in the claim, it being understood that changes may be made in the construction and arrangement of parts without departing from the spirit of the invention as claimed.

Referring to the drawings:

Figure 1 is a side elevational view of a cultivator constructed in accordance with the invention.

Fig. 2 is a sectional View taken on line 2-2 of Fig. 1.

Fig. 3 is a sectional view taken on line 3-3 of Fig. 2.

Referring to the drawings in detail, the frame of the cultivator which is supported by means of the wheels 5, is indicated by the reference character 3.

The frame of the cultivator comprises wide side plates 7 connected at their forward ends by the plates 8.

The wheels 5 are mounted on the axle 9 on which the wheels 5 operate, there being provided a sprocket iii attached to the side of one of the wheels, over which the chain ll operates, the chain it also operatin over the sprocket l2 secured at one end of the hollow shaft [3, of which the gear to forms a part.

The pulley 15 which is substantially large, is also formed integral with the hollow shaft l3, which pulley provides the power pulley of the mechanism, and is operated by means of the belt !6 which operates thereover, the belt l6 also operating over the pulley H which is operated by means of the internal combustion engine I8 mounted on the platform l9 forming a part of the tractor.

mounted.

This auxiliary frame also includes the side plate 24 at the opposite side of the frame, the plate 24 having bearings 25 and 2B in which the shafts 27 and 23 respectively operate.

The plate 23 is also provided with a bearing 29 in which the shaft 30 operates, the shaft 30 bein supplied with the pulley 3!, over which the belt 32 operates, the bolt 32 also operating that is supported in the bearings 36 secured to edges of the side plates 1 of the main frame of the machine. As shown, this soil would evenly spread.

The auxiliary frame includes a rear plate 31 to which the forwardly extended arms 38 are secured, the arms 38 having bearings in which the shafts 39 and 40 are positioned.

The shaft 40 provides a support low shaft I3, which rotates thereon.

The shafts 39 and 40 provide supports for the auxiliary frame and permit the auxiliary frame to pivot in a horizontal plane.

Disposed under the rear surface of the plate 3'! and formed integral therewith, is an internally threaded enlargement 4! in which the threaded es, the shaft 42 extending through in the bar 43 secured to the inner for the holbe tightened to hold the auxiliar fr adjusted position. y mm m Its Supported between the side plates 23 and 24 of the auxiliary frame, are upper and lower sets or crank disks 41 the adjacent crank disks of each set being connected by shafts l1 eccentrically connected to the crank disks and to which the arms 48 of the earth working tools are connected, the connection between the crank disks and the arms of the earth working tools being such that when the outer earth working tools of the sets are elevated, the inner set of earth working tools will be contacting the ground surface. Blades 49 are provided on the free ends of the arms of the earth working tools and are constructed to simulate hoes so that in operation, the arms and blades 49 will contact the ground surface with a digging action simulating the action of a hoe in the hands of a person using a hoe. At the forward end of the machine, are pivoted arms 50 that are normally held in their operative positions by the coiled springs 5| engaging the upper ends of the arms 50. The lower front ends of these arms are curved to move over weeds or high grass pressing the weeds or high grass downwardly against the ground surface as the machine moves thereover.

Handles 52 extend rearwardly from the machine and afford means whereby an operator may control and guide the operations of the machine. An engine control rod 53 is mounted on the handles and may be readily operated by the attendant of the cultivator.

From the foregoing it will be seen that when the machine is in operation, the earth working tools will be swung in a manner simulating the action of a hoe to cut into the ground surface and cultivate the surface for planting purposes.

Having thus described the invention, what is claimed is:

In a cultivator, a main wheel supported frame, an auxiliary pivoted frame mounted within the wheel supported frame for rotation within the supporting frame, crank disks mounted within the auxiliary frame arranged in upper and lower groups, crank shafts connecting the adjacent crank disks, said crank shafts being eccentrically connected with said disks, earth working tools including arms mounted on the adjacent crank shafts of the upper and lower groups of disks. gearing supported between said frames operating said disks, and tools connected with said disks, a threaded enlargement secured to the auxiliary frame, a vertical threaded shaft operating through the threaded enlargement, means mounting said vertical threaded shaft for arcuate movement on the main wheel supported frame. and a crank handle effecting rotation of the threaded shaft in the threaded enlargement rotating said pivoted frame in the arc of a circle, adjusting the angle of operation of the earth working tools carried thereby.

GORDON A. BURR.

References Cited in the file of this patent UNITED STATES PATENTS 

